Hi Mary - here is one thought about your undigested pills.
It could be that your system is moving so fast that it doesn't get the chance to break the pill down, look and see if there is a chewable version of this med, also check with your pharmacy and see if they can make a liquid form of Levbid for you. A lot of pill medication can actually be turned into liquid form and also flavored. Or while taking Levbid try taking Immodium or equivalent with it. The Immodium may help slow your insides down just long enough to help break the pill down and make it digestable so it actually gets absorbed into your system the way it should.
Hope this helps.....
Colette the crohny for 24 years and counting
Stephie the caregiver